Results 31 to 40 of about 1,331,618 (275)

Relationship of Transport Coefficients with Statistical Quantities of Charged Particles

open access: yesThe Astrophysical Journal, 2023
In previous studies, a general spatial transport equation was derived from the Fokker–Planck equation. The latter equation contains an infinite number of spatial derivative terms T _n = κ _nz ∂ ^n F /∂ z ^n with n = 1, 2, 3, ⋯ .
J. F. Wang, G. Qin
doaj   +1 more source

The Effect of Diffusion on the Particle Spectra in Pulsar Wind Nebulae

open access: yes, 2013
A possible way to calculate particle spectra as a function of position in pulsar wind nebulae is to solve a Fokker-Planck transport equation. This paper presents numerical solutions to the transport equation with the processes of convection, diffusion ...
Moraal, H., Vorster, M. J.
core   +1 more source

Non-Markovian Random Walks and Non-Linear Reactions: Subdiffusion and Propagating Fronts

open access: yes, 2010
We propose a reaction-transport model for CTRW with non-linear reactions and non-exponential waiting time distributions. We derive non-linear evolution equation for mesoscopic density of particles.
D. ben-Avraham   +5 more
core   +1 more source

Solutions of a Neutron Transport Equation with a Partly Elastic Collision Operators

open access: yesMathematics
In this paper, we derive sufficient conditions that guarantee an description of long-time asymptotic behavior of the solution to the Cauchy problem governed by a linear neutron transport equation with a partially elastic collision operator under periodic
Abdul-Majeed Al-Izeri, Khalid Latrach
doaj   +1 more source

Key Problems to Be Solved Possibly Using Machine Learning in Heavy Ion Collisions

open access: yesYuanzineng kexue jishu, 2023
Heavy-ion collisions provide a unique opportunity to study the nuclear equation of state for a wide range of densities, temperatures, and neutron-proton asymmetries in the laboratory.
ZOU Ying;ZHANG Yuhai;TANG Na;LI Jingjing;ZHANG Fengshou
doaj   +1 more source

Feasibility and Safety of High‐Dose Proton Re‐Irradiation in Recurrent Pediatric Central Nervous System Tumors: A Single‐Institution Retrospective Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Purpose Pediatric central nervous system (CNS) tumors often recur despite multimodality therapy. Although re‐irradiation (re‐RT) has historically been limited by concerns for severe late toxicities, modern techniques have renewed interest in this approach. Proton therapy provides dosimetric advantages that may enable curative re‐treatment with
Jin‐Ho Song   +15 more
wiley   +1 more source

Mean-field and Monte Carlo analysis of multi-species agent dynamics

open access: yesFrontiers in Physics
We propose a mean-field (MF) approximation as a recurrence relation governing the dynamics of m species of particles on a square lattice. We simultaneously perform Monte Carlo (MC) simulations under identical initial conditions to emulate the intricate ...
Eduardo Velasco Stock   +2 more
doaj   +1 more source

Radial intensity gradients of galactic cosmic rays in the heliosphere at solar maximum: 1D no-shock simulation [PDF]

open access: yesGeofísica Internacional, 2009
We study the spatial distribution of galactic cosmic rays in the heliosphere at solar maximum of cycles 21, 22 and 23, using a one-dimensional no-shock model of the cosmic ray transport equation.
R. A. Caballero-Lopez   +1 more
doaj  

From conformal invariance towards dynamical symmetries of the collisionless Boltzmann equation

open access: yes, 2015
Dynamical symmetries of the collisionless Boltzmann transport equation, or Vlasov equation, but under the influence of an external driving force, are derived from non-standard representations of the $2D$ conformal algebra.
Henkel, Malte, Stoimenov, Stoimen
core   +4 more sources

Feasibility and Preliminary Efficacy of Integrative Neuromuscular Training for Childhood Cancer Survivors: A Pilot Study

open access: yesPediatric Blood &Cancer, EarlyView.
ABSTRACT Background Survivors of childhood acute lymphoblastic leukemia (ALL) often exhibit early deficits in muscle and movement competence, which can compromise long‐term health. Integrative neuromuscular training (INT), a multifaceted approach combining fundamental movement activities with strength exercises, may help address these deficits during ...
Anna Maria Markarian   +7 more
wiley   +1 more source

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